Product category: Power Supply ICs and Controllers
News Release from: Linear Technology Corp | Subject: LTC4263
Edited by the Electronicstalk Editorial Team on 19 February 2007
Power sourcing equipment controller in
single IC
Complete single-port power-over-Ethernet PSE solution detects, classifies and provides isolated 48V power to powered devices connected to it.
Linear Technology has introduced the LTC4263, an autonomous single-channel power sourcing equipment (PSE) controller with an onboard MOSFET for use in IEEE802.3af power over Ethernet (PoE) compliant systems Requiring only a few external components, the IC is a complete single-port PSE solution that detects, classifies and provides isolated 48V power to powered devices (PDs) connected to it
This article was originally published on Electronicstalk on 28 Jul 2004 at 8.00am (UK)
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Offering standard-compliant AC or DC methods to sense the removal of a PD and featuring sophisticated onboard control algorithms, the LTC4263 provides autonomous operation through all of the required tasks without processor intervention.
Using an internal sense resistor, the LTC4263 provides precision inrush, current limit and short circuit control to further ensure IEEE802.3af compatibility.
The port current limit can be configured to automatically adjust to the detected PD class.
Advanced detection and power monitoring techniques prevent damage to legacy data-only devices, while still supplying power to newer, Ethernet-powered devices.
The LTC4263 also allows for simple implementation of power management across multiple ports, while being driven by a single power supply.
The rich feature set allows the IC to significantly simplify the PSE implementation, requiring only a single 48V supply and a small number of passive support components.
It also makes the part an ideal choice for IEEE802.3af compliant endpoint/midspan systems, including low port count PSEs or stand-alone PSEs.
Specified over the full commercial and industrial temperature range, the LTC4263 is offered in 14-pin 4 x 3mm DFN and SO-14 packages.
Pricing begins at US $2.95 each in 1000-piece quantities. Request a free brochure from Linear Technology Corp ...
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